Incluye referencias bibliográficas

Contenido: 1. On permutations -- 2. The definition of a group -- 3. On the simpler properties of a group which are independent of its mode of representaqtion -- 4. Further properties of a group which are independent of its mode of representation -- 5. On the composition-series of a group -- 6. On the isomorphism of a group with itself -- 7. On Abelian groups -- 8. On groups whose orders are the powers of primes -- 9. On Sylow's theorem -- 10. On permutation groups: transitive and intransitive groups -- 11. Transitivity and primitivity -- 12. On the representation of a group of finite order as a permutation-group -- 13. On groups of linear substitutions; reducible and irreducible groups -- 14. On the representation of a group of finite order as a group of linear sustitutions -- 15. On group-characteristics -- 16. Some applications of the theory of groups of linear substitutions and of group characteristics -- 17. On the invariants of groups of linear substitutions -- 18. On the graphical representation of a group -- 19. Groups of genus zero and unity Cayley's colour-groups -- 20. On congruence groups.